Oil-well tool



Sept. 25, 1928.

G. D. WATSON OIL WELL TOOL Filed Nov. 16, 1925 IN VEN TOR.

Patented Sept. 25, 1928.

UNITED {STATE PATENT OFFICE.

GEORGE n. wA'rsoiv, or TORRANCE, CALIFORNIA.

OIL-WE'LL TOOL.

Application med November 16, 1925. Serial No. 69.323.

This invention relates to oil well tools, and particularly to that classof oil well tool known as a swage. Swages are used wherever pipe hascollapsed, due to various causes such as a well hole'caving in andbending inwardly the said pipe. The ordinary way oi: taking out thedents-in a plpc is to use what are called swages, and which usi'iallycomprise an down the swage. After the swage has been driven through thecollapsed or dented portion of the pipe the 's'wage is then pulled backup the pipe to further assure that the bad place is entirely ironed out.It often occurs that small swages must first be used.to start' the badplace after which larger 'swages are consecutively used until a swage ofmaximum diameter is easily driven through the pipe. 7

The present invention has for an object the provision of a swage whichis easily handled andmay be easily jarred past a bad place ina pipe, andwhich isso constituted as 'not'to readily wedge in a bad place of thepipe. The wedging of swages in the ordinary form of s'wage often resultsin a breaking of'the pin of the swage, which of course will result inserious damage to the oil well, because a swage with abroken pin isalmost impossible to remove. I v 7 Another object of the inventionis'the provision of a swage which may be'e'asily manufactured and whichis simple of structure and generally superior.

\Vith the above and other objects in view,

the invention consists in the novel and useful provision, formation,construction, association and relative arrangement of parts, members andfeatures, all as shown in'the drawing, and finally pointed outincl-aims.

In the drawing: v p

Figure 1 is an elevation of one form of swage;

Figure 2 is an elevation of a second form of swage; v Figure 3 shows theaction of the second form of swage within a bad casing;

Figure 4 is a cross sectional view on an enlarged scale, and taken onthe line 44 of Figure 1; V

Figure 5 is a cross sectional view on the line 5-5. of Fig. 3, thecasing being shown m'tull lines; i

a Figure 6 is a fragmentary enlarged plan viewoft-he'method ofassociating rollers with the ribsof the swage; and, 1

Figure 7 is across sectional view on the line 77 of Figure 6, and on anenlarged scale from theshowing of Fig. 6.

Corresponding parts in all the figures are designated by the samereference characters.

Referring with particularity to the drawing, I have designatedtw'oembo'diments of my invention by- A and B. Generally, the

constructional features of both of'said embodiments are the same.

Referring to Figures 1 and 4, the swage includes a body portion a whichisfo'rmed adjacent one end with a. shank portion 1' which terminates ina tapered screw-threaded pin 2, the opposite end of the body taperingtoa point or approximately a point shown at A sectionof the bodyshowsthat the body is cruciform in section forming four spaced ribs 4, 5, 6and 7 extendingfrom a central portion 8. The ribs are in the form of aspiral helix from that zone marked 9 to the point 3, while the portionof said ribs above the zone marked 9 is in the form of a helix. It is tobe noted that the spacing between the ribs allows for circulation pas-vsages 10. The ribs extend to the zone of a curved shoulderil which isjoined to the shank 1. Carried by each rib is a seriesof spacedanti-friction means 6. The said'anth friction means in the presentembodiment takes the form of rollers, the axis of each roller beingapproximately at right angles to the longitudinalaxis of the body of theswage. Thus, when the swage of the form shown in Figure 1 is insertedwithin'casing which has an indented portion to be removed, there will beno tendency for the swage to twist or turn due to the spiral arrangementof the arms. The anti-friction means b may be conveniently insert dwithin the ribs by the method shown in Figures 6 and 7, wherethe rollersfrom escaping from the bores 12. These pieces l iwill conform in shapeto the rib, as shown in Fig. 6, and such pieces may be convenientlysecured to the rib by welding or any other well known means.

case that he is aware of considerable difficulty is experienced inplacing the rollers within the swage body. I'Vith the present method asjust described, it is an easy matter for anymechanic to insert rollers1n the ribs, the very CODSlJlUCtlOlT of the swage easily per-- I mittingthisto be accomplished. The swage shown in Figures 2 and 3 does notdiffer essentially from the form shown in Figure 1,

j with the exception that the said ribs 16, 17 and 18 joined to thecenter section 19, are not spirally arranged with relation to saidcenter section 19. 'Furthermore, two of the ribs 15 and 17. which arediametrically opposite, are

of greater'length than the ribs 16 and 18.

- The two ribs 15 and 17 come to a point, or

' may be made in'the pin and shank of the approximately a point, asshown at 20, and

the two ribs 16and 1S terminate some distance above the said point 20.Each of the said ribs, as is the case of the form A carriesanti-friction members 6 and which anti-friction members are securedwithin said ribs in the same manner as for the form A. In order toprovide for circulation or relief of pres sure when the swage isactually used, a bore swage with the bore having branch portions 7 whichpermit communication between adjacent ribs, as shown in Figure 3 bydotted lines at 21 and 22.

The operation of the swage just described 40 i is. as follows:

In Figure 3 I have shown what may be termed a badxpipe or casing C andwhich pipe has collapsed or become indented at the zone marked 23. It isperhaps unnecessary to state that swages are used which have a diameterbut a fraction of an inch smaller than the diameter of the casingthrough which it must be passed, and it will be noted in thepresentinstance that-the roller members on the swage are contacting withthe innersurface of the casing, as

shown at 24c. The ribs 15 and 17 have contacted with the restricted zone23 of the casing and their tendency will be to wedge apart suchcollapsed wall of the casing priorto the V ribs 16 andl8 contacting withsuch collapsed swage shown in Figs. 2 and 3 has successfully operated inthe bad pipe or casing, the pipe will assume a form as appears in Figure5, wherein it Wlll be seen thatdue to the right- ,angled relationbetween the ribs the pipe is forced outwardly at adjacent ends of eachrib, as shown at 25 more thanthe pipe is forced outwardly-in zonesintermediate the ribs as shown at 26. The result will be that the pipeis not round. To make the pipe round the tools are drawn up to thesurface of the well and the swage of the form shown in Fig.1 is thenlowered withinthe casing and this swage when jarred will make the pipeperfectlyround, as would be evident upon an inspection of Fig. 4, forthe reason that there will be a zone of contact against thepipe at allportions of the pipe, due to the spiral formation of the ribs.

It is obvious thatvarious minor changes and modifications may be made inpracticing the invention, in departure from the particular showing ofthe drawing, without departing from the truespirit of the invention.

Having thus disclosed my invention, I claim and desire to secure byLetters Patent:

1. Aswage formed with spaced ribs and tapering toward its forward end.

2. A swage formed with'spaced ribs and tapering toward itsforward end,and antifriction means on the outer face of saidribs.

3. A swage formed with spaced spiral ribs and tapering toward itsforward end.

4. A swage formed with spaced spiral ribs and tapering toward itsforward end, and antifriction means on the outer face of said ribs.

5. A swage formed with ribs extending 'from' end to end, andanti-friction roller-s facilitatej arring of the swage in a well casing.

In testimony whereofI have signed my name to this specification' GEORGED. WVATSON.

